Shark Tank - Season 4

All five sharks consider business propositions that include a ticket-free coat check system, a belt buckle that doubles as a beverage holder, and what two woman say is the solution to bedbugs.

The sharks question the morality of a potential investment; two business partners have professional surfer Lakey Peterson demonstrate how their exercise equipment works; a man presents a personal style system.

Professional dancers Jonathan Roberts and Anna Trebunskaya demonstrate their posture correction device; entertainment reporter Robin Leach and a designer from Florida present stone-studded leather jewelry; a gluten-free cookie business.

An unemployed man and his pregnant wife pitch a party-favorite chicken dip; a professional football player's spring-loaded laundry hamper, a technophobe presents his wireless gadget that helps people keep track of their keys or cell phone.

A line of dresses made of pillowcases; a unique spatula; vitamin oral sprays; energy-boosting waffles.

Professional football player Brandon Jacobs hopes to help a woman find success with her protein-infused energy drink; a lobster roll food truck; eco-friendly cleaning products; colorful drink insulators; follow-up on a lip balm idea.

A modern-day slip business; a scrubbing tool; dog-friendly frozen yogurt; an electric unicycle; an update on the "Lollacup."

Seth MacFarlane shows his support for a man who designed a new fly trap; multi-functional child cover; food storage container; follow-up on a manicure system.

A motorized vehicle suit; comedy writer Bruce Vilanch presents a computer instruction project; sugar-free candy chips; an update on a foldable guitar.

An energy and nutritional supplement designed and tested by active members of the military; a new way to shop for bridal wear; a wine tasting cruise.

A rent-a-live Christmas tree service; gluten-free fudge; cell phone accessory; indoor/outdoor play space; singer John Rich surprises an entrepreneur.

Mark and Lori offer an entrepreneur $1 million; enclosed tabletop food screen; a beer and arcade game cabinet; peel-off face paint transfer; hair care products for children; update on Squirrel Nut Butter.

A capsule that keeps beverages hot for an extended period; a new way to clean stuffed toys; reinventing the ice cream experience.

Sandals for barefoot runners; a magnetic sound enhancer that doesn't need power; a website that creates personalized soundtracks for children; an update on "Cousins Lobster."

A successful entrepreneur returns with a new business idea; hand-held cooler; environmentally friendly dry cleaning bag; chewing tobacco alternative.

Kevin O'Leary makes a $1 million offer; six young inventors aged 12 to 18 present their unsafe-driving detector; a mini-muffin that is a twist on s'mores; an online chat therapy business.

Unique eyewear made of sustainable wood; a camouflage clothing line for duck hunters; a premium denim line; high-end bedding for girls.

Fortified, sugar-free nut butters; an acupressure wrist band; an at-home tattoo removal device; an update on inventors who created surf-inspired fitness equipment.

A workout program that teaches people how to exercise in their heart rate zone; throwing dance parties for kids with a traveling disco van; a damage-proof cell phone case; an update on The Painted Pretzel.

Two entrepreneurs try to solve the "carmuter triangle"; an 18-year-old seeks an investment in her natural skincare line of sugar scrubs; shrink-wrap gift bags.

Gourmet meat business; a cooler with interior LED lighting; full-body spandex suit; an advance filter water bottle; follow up on a play and party space for kids from season 4.

A fishing bobber made from a shotgun shell; homemade cupcakes in a jar; generating electricity through walking; a belt with no holes; a fitness-based dance program.

Frozen concentrated gumbo brick; a bird feeder that shocks squirrels; artisan coffee subscription business; wooden home and kitchen items; ECreamery update.

Teaching kids how to ride a bike that doesn't have pedals; a movie about motorcycle racing; a hot-pink food truck run by beautiful women; fun photo booths.

Two women pitch their military-inspired jewelry line; traditional British scone; custom furniture; door-to-door luggage pickup service; update on the Scrub Daddy cleaning tool.

An app that provides international travelers with access to live translators; all-natural dog treats; a dating website designed to attract quality singles; gourmet grilled cheese and tomato sandwiches; Dr. Heinz Doofenshmirtz ("Phineas and Ferb").